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Safety relay module SRM 21 RT2
Technical data
| Standards | EN ISO 13849-1; EN 62061; EN 60204-1, BG-GS-ET 20; EN 60947-5-1, -3; EN 61326-3-1 |
|---|---|
| Enclosure | black polycarbonate; polyamide terminal clamps V0 |
| Contact material | AgNi 10 + 0.2 µm Au |
| Mounting | DIN rail mounting |
| Connection | screw terminals with + and - screws |
| Cable cross-section | min. 1x 0.5 mm² (AWG 20) including conductor ferrules, max. 1x 2.5 mm² (AWG 14) including conductor ferrules, 2x 1.5 mm² (AWG 16) including conductor ferrules |
| Degree of protection | Enclosure IP 40, Terminal block IP 20 to IEC/EN 60529, shock protection to VBG 4 |
| Safety-relevant data:* | |
| EN 60204-1 | stop category 0 |
| EN 62061 | SIL CL 3 |
| PFHd | 3 x 10-8 1/h |
| EN ISO 13849-1 | PL e, Category 4 |
| Safety requirements nop | |
| hop | 8 h/day |
| dop | 220 days/year |
| tzyklus | 30 s |
| TM | max. 20 years |
| MTTFd | > 86 years |
| DC/DCavg | > 99 % |
| Rated operating voltage Ue | 24 VDC ±15 % |
| Rated operating current Ie | 0.125 A |
| Rated operating isolation voltage Ui | 250 VAC |
| Rated impulse withstand voltage Uimp | 4 kV |
| Conditional short-circuit current | 1000 A |
| Inputs | 1 NC/1 NO contact or 2 NC contacts, 1 feedback circuit, 1 start input (monitored) |
| Outputs | 2 enabling paths, 1 transistor output as signalling output |
| Ie/Ue enabling paths | 3 A/230 VAC; 2 A/24 VDC |
| Utilisation category | AC-15; DC-13 |
| Contact load capacity | min. 10 mA |
| Typ. input current/ voltage | 22 mA/ 20 VDC |
| Max. load of signalling output | 20 mA |
| Short-circuit current Ik | power supply 2A slow blow enabling paths 6 A gG/gN fuse |
| Delay on energisation/ deenergisation | ≤ 20 ms |
| Risk time | ≤ 0.5 s (switch-on delay) |
| Mechanical life | > 50 million operations |
| Display | 1 LED for supply voltage, 1 LED each for input A and B, 1 LED for authorisation |
| Degree of pollution | 2 |
| Overvoltage category | III |
| Ambient temperature | 0 °C … +55 °C |
| Storage and shipping temperature | -22 °C … +70 °C |
| Shock resistance | 3 g |
| Approvals |   |
| Note | Inductive loads (contactors, relays etc.) are to be suppressed by suitable circuitry. |
| Weight | 220 g |
| Ordering details |
 |
| Type | Material no. | |
| Safety relay module SRM 21 RT2 | 1179203 |